- Racing Car Supplies, Ottawa
- Racing Including Track Operations, Ottawa
- Radiator Coolant & Solvents, Ottawa - Engine Coolant
- Radiator Repair, Ottawa - Gas Tank Repair
- Radio & Television Repair Shops , Ottawa - TV Repair
- Radio Communications Equipment & Systems , Ottawa
- Radio Stations & Broadcasting Companies, Ottawa
- Radiology Equipment & Services, Ottawa - X-Ray Equipment & Supplies
- Radiotelephone Communications, Ottawa
- Railroad Companies, Ottawa
- Railroad Services, Ottawa
- Reading Instruction Schools, Ottawa
- Ready Mix Concrete, Ottawa - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Ottawa
- Real Estate, Ottawa - Agent, Broker & Companies
- Real Estate Agencies, Ottawa
- Real Estate Agent & Broker Services, Ottawa
- Real Estate Agent - Property Lessors, Ottawa
- Real Estate Appraiser, Ottawa - Appraisal Services
- Real Estate Appraisers & Consulting Services, Ottawa
- Real Estate Attorneys & Lawyers, Ottawa
- Real Estate Broker, Ottawa
- Real Estate Consultants, Ottawa
- Real Estate Developers, Ottawa
- Real Estate Lawyers & Attorneys, Ottawa
- Real Estate Management, Ottawa
- Real Estate Properties, Ottawa
- Real Estate Property Investment Properties, Ottawa
- Real Estate Rentals, Ottawa
- Real Estate Services, Ottawa
- Real Estate Staging Service, Ottawa
- Record Storage, Destruction & Management, Ottawa
- Recording Studio - Equipment & Rental, Ottawa
- Records, Tapes, Cd & Dvd Manufacturers, Ottawa
- Records, Tapes, CDs - Used & Vintage, Ottawa
- Records, Tapes, Compact Discs Wholesale, Ottawa
- Recreational Equipment & Supplies Companies, Ottawa
- Recreational Equipment Repair & Service, Ottawa
- Recreational Good Manufacturers, Ottawa
- Recreational Organizations, Ottawa
- Recreational Services, Ottawa
- Recreational Vehicles & Campers Rent & Lease, Ottawa
- Recycling Drop-Off Centers, Ottawa
- Recycling Scrap & Waste Materials, Ottawa - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Ottawa
- Reflexologists, Ottawa
- Reformed Churches, Ottawa
- Refrigerated Beverage Dispenser, Ottawa - Water Coolers Equipment & Supplies
- Refrigerated Storage & Warehouse, Ottawa - Warehousing
- Refrigeration & Air Conditioning Contractors, Ottawa - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Ottawa - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Ottawa - Ac, Freezer, Refrigerator Repair
- Refrigerator & Freezer Equipment, Parts & Supplies, Ottawa
- Refrigerator Sales, Service & Repair, Ottawa - Fridge
- Refuse Collection & Disposal, Ottawa
- Refuse Collection & Disposal Services, Ottawa
- Refuse Systems & Garbage Disposal, Ottawa
- Rehabilitation Centers, Products & Services, Ottawa
- Rehabilitation Specialists, Ottawa
- Rehabilitational Job Training Services, Ottawa
- Religious Charitable & Non-Profit Organizations, Ottawa
- Religious Goods & Church Supplies Stores, Ottawa
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- Religious Organizations, Ottawa
- Religious Services, Ottawa
- Relocation Services, Ottawa
- Rental & Leasing Business Equipment, Ottawa
- Repair Services, Ottawa
- Reprographic Services, Ottawa
- Research & Development Bureaus, Ottawa - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Ottawa - Laboratories
- Research Clinics, Ottawa
- Research Service Libraries, Ottawa
- Research Services, Ottawa
- Residential, Ottawa
- Residential Apartments, Ottawa
- Residential Architect, Ottawa
- Residential Care Facilities, Ottawa
- Residential Construction Contractors, Ottawa - General Contractors
- Residential Electricians, Ottawa - Electric Contractors
- Residential Lighting Fixtures Manufacturers, Ottawa
- Residential Real Estate Companies, Ottawa
- Restaurant & Food Service Management Services, Ottawa
- Restaurant & Lounge, Bar, Or Pub, Ottawa
- Restaurant Equipment, Ottawa
- Restaurant Equipment & Supplies, Ottawa
- Restaurant Equipment Repair & Service, Ottawa - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Lobster, Ottawa
- Restaurant Management & Consulting, Ottawa - Food Facilities Consultants
- Restaurant Supplies & Equipment, Ottawa
- Restaurants/Food & Dining, Ottawa
- Restoration Contractors, Ottawa
- Resume Service, Ottawa
- Retail Book Stores, Ottawa
- Retaining Wall Contractors, Ottawa - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement & Estate Planning, Ottawa
- Retirement Communities & Home, Assisted Living & Apartments, Ottawa
- Retirement Homes, Ottawa
- Retirement Planning Consultants & Services, Ottawa
- Reweavers Garment Services, Ottawa
- Rhema Church, Ottawa
- Rheumatologists, Ottawa - Rheumatology Doctors, Physicians & Surgeons
- Ricoh Copy Machines, Ottawa
- Riding & Rodeo Services, Ottawa
- Riding Apparel & Equipment, Ottawa
- Risk Management Consultants, Ottawa
- Road Construction, Ottawa - Companies & Contractors
- Road Construction & Repair Contractors, Ottawa
- Roadside Assistance, Road Service & Towing Service, Ottawa
- Robots & Robotics System, Ottawa
- Rods, Springs & Suspension Equipment & Supplies, Ottawa
- Roofing & Siding Materials, Equipments & Supplies, Ottawa - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, Ottawa - Roofing Companies
- Roofing Contractors, Ottawa - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Ottawa
- Rooming & Boarding Houses, Ottawa
- Rubber Products, Ottawa
- Rubber Products - Retail, Ottawa
- Rubber Stamps, Ottawa
- Russian Churches, Ottawa
- Rust Preventives, Ottawa
- RV & Campers Repair & Service, Ottawa
- RV Repair, Ottawa - Recreational Vehicle
- Rvs Sales, Rental & Leasing, Ottawa
- Ryder Truck Rental , Ottawa - Ryder Moving
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